January weather forecast
New Castle, PA

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Weather in January

Amidst the harsh winters of New Castle, Pennsylvania, January stands out with the highest relative humidity of 86%. Snowfall is a common phenomenon, covering the city in a mantle of white that contrasts beautifully with the frequent, overcast skies. The predominance of cloudy weather combined with the low sun exposure can somewhat limit visibility during this time. It's a season where outdoor activities are replaced by cozy fireplaces indoors. Woolens and snow boots are crucial to face the bristling wind and cold temperatures.

Temperature

In New Castle, January is the coldest month, with temperatures averaging a high of 31.5°F (-0.3°C) and a low of 18.9°F (-7.3°C).

Humidity

The average relative humidity in January is 86%.

Rainfall

In New Castle, Pennsylvania, in January, it is raining for 8.8 days, with typically 2.64" (67mm) of accumulated precipitation. In New Castle, during the entire year, the rain falls for 177.6 days and collects up to 34.92" (887mm) of precipitation.

Snowfall

Months with snowfall in New Castle are January through May, October through December. The month with the most snowfall is January, when snow falls for 18.6 days and typically aggregates up to 6.93" (176mm) of snow.

Daylight

The average length of the day in January is 9h and 38min.
On the first day of the month, sunrise is at 7:46 am and sunset at 5:03 pm. On the last day of January, sunrise is at 7:33 am and sunset at 5:36 pm EST.

Sunshine

January has the least sunshine of the year in New Castle, with an average of 2.5h of sunshine.

UV index

The average daily maximum UV index in January in New Castle, Pennsylvania, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In January, an average UV index of 2 transforms into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the coldest time of year in New Castle?

In New Castle, January is the coldest month, with temperatures averaging a high of 31.5°F (-0.3°C) and a low of 18.9°F (-7.3°C).

How cold is it in New Castle in January?

The high-temperature during January is 31.5°F (-0.3°C) and the low-temperature is 18.9°F (-7.3°C).

What is the average humidity in January in New Castle?

In January, the average relative humidity is 86%.

How many days does it rain in January in New Castle?

In New Castle, during January, the rain falls for 8.8 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When does it snow the most in New Castle?

The month with the most snowfall is January, when snow falls for 18.6 days and typically aggregates up to 6.93" (176mm) of snow.

How many days does it snow in January in New Castle?

In New Castle, in January, during 18.6 snowfall days, 6.93" (176mm) of snow is typically accumulated.

How many hours of daylight does New Castle have in January?

The average day length in January in New Castle is 9h and 38min.

When are sunrise and sunset in January in New Castle?

On the first day of January in New Castle, sunrise is at 7:46 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:36 pm EST.

What is the month with the least sunshine in New Castle?

The month with the least sunshine in New Castle is January, with an average of 2.5h of sunshine.

How many hours of sunshine does New Castle have in January?

In New Castle, the average sunshine duration in January is 2.5h.

What is the UV index reading in January in New Castle?

In January, the average daily maximum UV index in New Castle is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
38.1°F 3.4°C
31.5°F -0.3°C
35.4°F 1.9°C
Average low temperature
26.4°F -3.1°C
18.9°F -7.3°C
20.7°F -6.3°C
Average pressure
30.1" 765mmHg
30.1" 765mmHg
30.08" 764mmHg
Average wind speed
7.6mph 12.2km/h
8.3mph 13.4km/h
7.8mph 12.6km/h
Average max. wind speed
8.1mph 13km/h
8.8mph 14.2km/h
8.4mph 13.5km/h
Average wind speed gusts
11.9mph 19.2km/h
12.7mph 20.4km/h
12.2mph 19.6km/h
Average humidity
86%
86%
87%
Average rainfall
2.68" 68mm
2.64" 67mm
2.6" 66mm
Average rainfall days
12
8.8
10.3
Average snowfall
4.69" 119mm
6.93" 176mm
6.02" 153mm
Average snowfall days
14.3
18.6
15.9
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
3h 0min
2h 3min
3h 1min
Average sunshine days
9.4
7.7
7
Average UV index
1
2
2
Average cloud cover
68%
73%
70%
Average visibility
4mi 6.4km
4mi 6.4km
4mi 6.4km

Average temperature in January
New Castle, PA

Average temperature in January - New Castle, PA
  • Average high temperature in January: 31.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in January: 18.9°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in January
New Castle, PA

Average pressure in January - New Castle, PA
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
New Castle, PA

Average wind speed in January - New Castle, PA
  • Average wind speed in January: 8.3mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).

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Average humidity in January
New Castle, PA

Average humidity in January - New Castle, PA
  • Average humidity in January: 86%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).

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Average rainfall in January
New Castle, PA

Average rainfall in January - New Castle, PA
  • Average rainfall in January: 2.64"

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is November (2.24").

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Average rainfall days in January
New Castle, PA

Average rainfall days in January - New Castle, PA
  • Average rainfall days in January: 8.8 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in January
New Castle, PA

Average snowfall in January - New Castle, PA
  • Average snowfall in January: 6.93"

The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
New Castle, PA

Average snowfall days in January - New Castle, PA
  • Average snowfall days in January: 18.6 days

The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
New Castle, PA

Average daylight in January / Average sunshine in January - New Castle, PA
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 2h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in January
New Castle, PA

Average sunshine days in January - New Castle, PA
  • Average sunshine days in January: 7.7 days

The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (7 days).

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Average UV index in January
New Castle, PA

Average UV index in January - New Castle, PA
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
New Castle, PA

Average cloud cover in January - New Castle, PA
  • Average cloud cover in January: 73

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 36).

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Average visibility in January
New Castle, PA

Average visibility in January - New Castle, PA
  • Average visibility in January: 4mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February and December (4mi).

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New Castle, Pennsylvania, USA

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